#pragma once 

#include<string.h>
#include<sys/types.h>
#include<sys/stat.h>
#include<fcntl.h>
#include<stdlib.h>
#include<unistd.h>

#define LINE_SIZE 1024
#define FLUSH_NOW 1
#define FLUSH_LINE 2
#define FLUSH_FULL 4

struct myFILE 
{
  unsigned flags;
  int fileno;
  //缓冲区
  char cache[LINE_SIZE];
  int cap;
  int pos;
};

myFILE* my_fopen(const char *path,const char *flag);


void my_fflush(myFILE *fp);

ssize_t my_fwrite(myFILE *fp,const char *data,int len);
void my_fclose(myFILE *fp);
